查询词典 isotopes

Corbicula fluminea (Müller 1774) was bred in the laboratory and two shell samples (shell height, A=13 mm, B=9 mm) were selected to determine the carbon isotopic composition of the increment shells (aragonite, CaCO3) and the host water. The results indicate that the carbon isotopic compositions of the two shells increased as the δ^13 C values of the host water increased from -5.24‰ to 1.41‰, showing the influence of δ^13C values on the shell carbon isotopes.δ^13C value ranges from -4.76% to -2.09% and δ^13 C from -8.49% to -2.89%. The δ^13 C values of shells A and B are both more negative than the predicted equilibrium ones, indicating that the shell had used the metabolic CO2 rich in 12C during their growth process.

对双壳类河蚬进行了室内养殖，并选取两个壳体样品（壳高，A=13 mm， B=9 mm），测定其生长部分壳体和生长期间水体碳同位素，研究表明，随着水体碳同位素的升高（δ^13C由－5.24‰升至1.41‰），两壳体碳同位素也随之升高，表明水体对壳体碳同位素的影响；δ^13CA分布范围为－4.76‰~-2.09‰，δ^13CB为－8.49‰~-2.89‰，壳体A和B碳同位素均比预测平衡值偏负，表明壳体在形成过程中利用了新陈代谢产生的富集12C的CO2。

A radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known.

一种放射性超铀元素，用碳离子轰击锔而合成，已知有种同位素。

One of the benefits of co-locating a cyclotron and a scanner is the being able to produce and use short lived isotopes

对于回旋加速器和断层扫描的协同定位，其优点是能够生产和使用短寿命核素。

Wan Guojiang and Tang Degu:2000, Recent climate changes recorded by sediment grain sizes and isotopes in Erhai Lake.

王雨春 万国江王仕禄李社红黄荣贵：2000，红枫湖、百花湖沉积物中磷的存在形态研究。

Isotopes are heavier versions of an element; for example, deuterium is a heavier version of hydrogen.

同位素重版本的一个组成部分，例如，氘是氢的重版本。

Deuterium and tritium are isotopes of hydrogen, mainly present in natural water.

氘和氚都是氢的同位素，主要存在于天然水中。

More reactive are the heavier isotopes of hydrogen , deuterium and tritium

更为活跃的是氢的较重同位素，氘和氚。

Medical cyclotrons accelerate heavy charged particles （proton, deuteron, etc.） to produce radiation isotopes used for clinical applications.

医用回旋加速器主要用以加速重荷电粒子，藉由高速粒子与靶材发生的核子反应，生产放射性同位素供医疗使用。

In this paper, method of quantity calculation of mixed|source natural gas is established based on composition and carbon isotopes of methane and ethane.

利用天然气中甲烷和乙烷的组成及碳同位素值，建立了不同来源天然气混合的定量计算方法。

Here we present Pb isotopes of two ferromanganese crusts from Central Pacific, and obtain Pb isotope time series over the Cenozoic period in Central Pacific Ocean.

为此分析了取自中太平洋两块铁锰结壳样品的Pb同位素组成，获得了整个新生代的中太平洋Pb同位素演化历史。

Warden: That's a beautiful dog, but don't bring her again.

那是条漂亮的狗，但是不要再把她带来了。

You get up in the morning – no hangover!

你第二天早上起来的时候—不会宿醉！